On Wed, Apr 25, 2012 at 01:33:56PM -0700, Joji Mtt wrote: > I am trying to figure out if there would be a packet order issue with the > current version of OVS. Consider a case where a controller has added a > forwarding rule for a specific flow (Flow A) and this rule is not yet > installed in the DP. In this scenario, it is conceivable that certain > (bursty) traffic patterns on Flow A can result in the packets being sent > out of order. E.g. consider an initial burst of 5 packets that miss the > kernel flow table, followed by several subsequent packets arriving at > random intervals. As soon as the userspace processes the flow miss, it will > install a rule in the kernel. Depending on the relative timing of the rule > installation, any of these subsequent packets could get switched directly > by the kernel before the previous packets that took the slow path could get > forwarded. I couldn't find any special handling to cover this case. Most > likely it is already handled and I am just missing the part where it is > done. Could anyone clarify this for me?
Yes, it's possible to get out-of-order packets for this reason. _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
